Alert archive / North Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 7, NWS Greenville-Spartanburg, SC

July 14, 2012Macon County, North Carolina; Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this flash flood warning at Jul 14, 2012, 5:40 AM EDT for Macon County, North Carolina; Rabun County, Georgia. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 14, 2012, 5:40 AM EDT (09:40 UTC)
Expired
Jul 14, 2012, 9:04 AM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

Counties Rabun County, GA, Macon County, NC

The radar

The Greer radar (KGSP), 111 km from the middle of the area, began a volume at 09:41 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jul 14, 7:30 AM EDTFLASH FLOOD1 Ese Otto, NCMIDDLE CREEK IS FLOODING THE MIDDLE CREEK ROAD.
Jul 14, 7:30 AM EDTFLASH FLOOD1 Sw Dillard, GASUTTON BRANCH CREEK HAS FLOODED NEVILLE ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 9.7 hours before the alert went out and 206 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2012-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1892 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2012-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1892 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
819 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

773 
WGUS52 KGSP 140940
FFWGSP
GAC241-NCC113-141530-
/O.NEW.KGSP.FF.W.0007.120714T0940Z-120714T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
540 AM EDT SAT JUL 14 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN RABUN COUNTY IN NORTHEAST GEORGIA...
  SOUTHERN MACON COUNTY IN WESTERN NORTH CAROLINA...

* UNTIL 1130 AM EDT

* AT 535 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. DOPPLER RADAR ESTIMATED THAT BETWEEN TWO 
  TO THREE INCHES OF RAIN HAS FALLEN ACROSS THE                      
  DILLARD...SCALY...AND OTTO AREAS SINCE 3 AM. THE HEADWATERS OF THE 
  MIDDLE CREEK HAS LIKELY SEEN OVER THREE INCHES OF RAIN. RADAR      
  TRENDS INDICATE THAT AN ADDITIONAL INCH TO TWO INCHES OF RAIN MAY  
  FALL OVER THE AREA BY 8 AM.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CLAYTON...DILLARD...MOUNTAIN CITY AND OTTO.

MOTORIST AND PROPERTY OWNERS BETTY AND LAMB CREEKS SHOULD STAY ALERT 
FOR RAPIDLY RISING WATER LEVELS. THESE CREEKS MAY FLOOD BETTY CREEK 
ROAD AND ALONG U.S. HIGHWAY 23/441. OWEN...CARSON AND BEAVER 
BRANCHES COULD EXPERIENCE FLOODING IN LOW LYING AREAS. IN 
ADDITION...THE LITTLE TENNESSEE RIVER MAY FLOOD IN LOW LYING AREAS 
ESPECIALLY SOUTH TRYPHOSA AND SAM CORN ROADS SOUTH OF OTTO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

TO REPORT HIGH WATER...FLOODING...MUDSLIDES...LANDSLIDES OR OTHER
SEVERE WEATHER THROUGH OUR AUTOMATED REPORTING SYSTEM...CALL OUR TOLL
FREE NUMBER... 1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3499 8352 3511 8360 3514 8320 3500 8320
      3484 8337 3490 8362

$$

NED
3 follow-up statements
438 
WGUS72 KGSP 141141
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
741 AM EDT SAT JUL 14 2012

GAC241-NCC113-141530-
/O.CON.KGSP.FF.W.0007.000000T0000Z-120714T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RABUN GA-MACON NC-
741 AM EDT SAT JUL 14 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN MACON AND
NORTHERN RABUN COUNTIES UNTIL 1130 AM EDT...

AT 736 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. THE 
HEAVY RAIN CONTINUES TO FALL MAINLY ALONG THE RABURN AND MACON 
COUNTY LINE. RAINFALL AMOUNTS WERE AROUND ONE INCH AN HOUR. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CLAYTON...DILLARD...MOUNTAIN CITY AND OTTO.

THE LITTLE TENNESSEE RIVER WAS RISING FAST AND MAY FLOOD IN LOW 
LYING AREAS ESPECIALLY SOUTH TRYPHOSA AND SAM CORN ROADS.  IN RABURN 
COUNTY BETTY CREEK ROAD MAY ALSO BE AT BANKFULL AND OVERFLOWING IN 
LOW LYING AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES... AS WELL AS
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3499 8352 3511 8360 3514 8320 3500 8320
      3484 8337 3490 8362

$$
PAT
787 
WGUS72 KGSP 141147 CCA
FFSGSP

FLASH FLOOD STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
741 AM EDT SAT JUL 14 2012

GAC241-NCC113-141530-
/O.COR.KGSP.FF.W.0007.000000T0000Z-120714T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RABUN GA-MACON NC-
741 AM EDT SAT JUL 14 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN MACON AND
NORTHERN RABUN COUNTIES UNTIL 1130 AM EDT...

AT 736 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. THE
HEAVY RAIN CONTINUES TO FALL MAINLY ALONG THE RABUN AND MACON
COUNTY LINE. RAINFALL AMOUNTS WERE AROUND ONE INCH AN HOUR.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CLAYTON...DILLARD...MOUNTAIN CITY AND OTTO.

THE LITTLE TENNESSEE RIVER WAS RISING FAST AND MAY FLOOD IN LOW
LYING AREAS ESPECIALLY SOUTH TRYPHOSA AND SAM CORN ROADS. IN RABUN
COUNTY BETTY CREEK ROAD MAY ALSO BE AT BANKFULL AND OVERFLOWING IN
LOW LYING AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES... AS WELL AS
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3499 8352 3511 8360 3514 8320 3500 8320
      3484 8337 3490 8362

$$
PAT
105 
WGUS72 KGSP 141304
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
904 AM EDT SAT JUL 14 2012

GAC241-NCC113-141318-
/O.CAN.KGSP.FF.W.0007.000000T0000Z-120714T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RABUN GA-MACON NC-
904 AM EDT SAT JUL 14 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN MACON AND
NORTHERN RABUN COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS MOVED OUT OF THE AREA AND EXCESS RUNOFF FROM 
HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE 
WARNED AREA HAVE RECEDED OR WERE BEGINNING TO CREST...ENDING THE 
FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO 
YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3499 8352 3511 8360 3514 8320 3500 8320
      3484 8337 3490 8362

$$

PAT

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 14, 4:21 AM EDTAreal Flood AdvisoryGSPMacon99 min
Jul 14, 6:54 PM EDTSpecial Weather StatementGSPElbert51 min

Nearby

Flash Flood Warnings in North Carolina, 2012Flash Flood Warnings in Georgia, 2012Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.